Effects of Porous Walls on Hypersonic Boundary Layers over a Sharp Cone

Abstract

of curvature and of the attached shock are included for axisymmetric and non-axisymmetric disturbances. The ow in the hypersonic boundary layer is coupled to the ow in the porous layer. The theoretical model of a porous wall developed by Fedorov and his coworkers is used for regular microstructures. The physical parameters chosen correspond to those of their studies. The resulting transcendental equations are solved numerically. Neutral solutions are presented, indicating a destabilizing eect of the porous wall. The spatial growth rates determined demonstrate that the porous wall leads to a signicant increase in growth rates for non-axisymmetric modes.